docs: def commit(experiment_name, time):
      """
      Try to commit repo exactly as it is when starting the experiment for reproducibility.
      """
      try:
          sh.git.commit('-a',
                  m='"auto commit tracked files for new experiment: {} on {}"'.format(experiment_name, time),
                  allow_empty=True
              )
          commit_hash = sh.git('rev-parse', 'HEAD').strip()
          return commit_hash
      except:
          return '<Unable to commit>'